101420320551 has 16 divisors (see below), whose sum is σ = 147758816640. Its totient is φ = 61367548320.

The previous prime is 101420320513. The next prime is 101420320591. The reversal of 101420320551 is 155023024101.

It is a happy number.

It is not a de Polignac number, because 101420320551 - 2⁶ = 101420320487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101420320501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2462080 + ... + 2502933.

It is an arithmetic number, because the mean of its divisors is an integer number (9234926040).

Almost surely, 2^101420320551 is an apocalyptic number.

101420320551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

101420320551 is a deficient number, since it is larger than the sum of its proper divisors (46338496089).

101420320551 is a wasteful number, since it uses less digits than its factorization.

101420320551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4965646.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 101420320551 its reverse (155023024101), we get a palindrome (256443344652).

The spelling of 101420320551 in words is "one hundred one billion, four hundred twenty million, three hundred twenty thousand, five hundred fifty-one".